Add 90/21 and 50/70
1st number: 4 6/21, 2nd number: 50/70
90/21 + 50/70 is 5/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
90/21 = 90 × 10/21 × 10 = 900/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
50/70 = 50 × 3/70 × 3 = 150/210 - Add the two like fractions:
900/210 + 150/210 = 900 + 150/210 = 1050/210 - 1050/210 simplified gives 5/1
- So, 90/21 + 50/70 = 5/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+50/70 90/63+50/70